Hydrochemistry and environmental implications in the western alpine region of China  

作　　者：ZHAO Yue LI Zongxing LI Zhongping AOBULI Gulihumaer NIMA Zhaxi WANG Dong 

机构地区：[1]Observation and Research Station of Eco-Hydrology and National Park by Stable Isotope Tracing in Qilian Mountains/Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China [2]Oil and Gas Research Center,Northwest Institute of Eco-environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]College of Geography and Environmental Science,Northwest Normal University,Lanzhou 730070,China [5]Pishan Meteorological Bureau of Xinjiang Uygur Autonomous Region,Hetian 848000,China [6]Ali Branch of the Xizang Autonmous Region Hydrology Bureau,Ali 895000,China

出　　处：《Journal of Arid Land》2025年第4期411-439,共29页干旱区科学(英文版)

基　　金：supported by the National Science Foundation for Distinguished Young Scholars (42425107);the Top Talent Project of Gansu province, Chinese Academy of Sciences Young Crossover Team Project (JCTD-2022-18);the "Western Light"-Key Laboratory Cooperative Research Cross-Team Project of Chinese Academy of Sciences;the Ecological Civilization Special Project of Key Research and Development Program in Gansu Province (24YFFA009);the Gansu Science and Technology Program (25RCKA026);the Science and Technology Project of Lanzhou (2022-2-43);the Excellent Doctoral Program in Gansu Province (23JRRA573);the Lanzhou Talent-Driven City Development Initiative.

摘　　要：The western alpine region is an important freshwater supply and water conservation area for China and its surrounding areas.As ecological civilization construction progresses,the ecohydrology of the western alpine region in China,which is a crucial ecological barrier,has undergone significant changes.In this study,we collected 1077 sampling points and presented a comprehensive overview of research results pertaining to the hydrochemistry of river water,meltwater,groundwater,and precipitation in the western alpine region of China using piper diagram,end-member diagram,and hydrological process indication.Water resources in the western alpine region of China were found to be weakly alkaline and have low total dissolved solids(TDS).The mean pH values for river water,meltwater,groundwater,and precipitation are 7.92,7.58,7.72,and 7.32,respectively.The mean TDS values for river water,meltwater,groundwater,and precipitation are 280.99,72.48,544.41,and 67.68 mg/L.The hydrochemical characteristics of the water resources in this region exhibit significant spatial and temporal variability.These characteristics include higher ion concentrations during the freezing period and higher ion concentrations in inland river basins,such as the Shule River Basin and Tarim River Basin.The principal hydrochemical type of river water and meltwater is HCO^(3-)•SO_(4)^(2-)-Ca^(2+),whereas the principal cations in groundwater are Mg^(2+)and Ca^(2+),and the principal anions are HCO^(3-)and SO_(4)^(2-).In terms of precipitation,the principal hydrochemical type is SO_(4)^(2-)-Ca^(2+).The chemical ions in river water and groundwater are primarily influenced by rock weathering and evaporation-crystallization,whereas the chemical ions in meltwater are mainly affected by rock weathering and atmospheric precipitation,and the chemical ions in precipitation are derived primarily from terrestrial sources.The main forms of water input in the western alpine region of China are precipitation and meltwater,and mutual recharge occurs between river water a

关 键 词：hydrochemical type ion source piper diagram end-member diagram hydrological process western alpine region of China 

分 类 号：P641.3[天文地球—地质矿产勘探]